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Questions tagged [snapping]

Automatic process of moving points or features to match or coincide exactly with coordinates of another feature within a specified distance, or tolerance

53 questions with no upvoted or accepted answers
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56 views

Snap LineStrings considering direction in QGIS 3

I have 2 projected shape files: Roads (red) and public transit routes (blue): I want to snap the PT routes to the roads, but because of inaccurate marks sometimes the routes are snapped to the wrong ...
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70 views

Snapping geometries to a layer without distortion

I am looking for a plugin / script to snap a polygon layer (A) to a linestring layer (B), the example datasets in image 1. I have tried the 'Snap geometries to layer' tool in QGIS 3.4. This snaps ...
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180 views

How to show Vector Layer created by v.clean GRASS tool in QGIS

I have created vector layer using GRASS tool v.snap, which resulted in a vector layer as output. I want to display the vector layer in QGIS. How can i view the vector layer created by snap tool in ...
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390 views

Change QGIS Snapping-Utility-Vertex-Marker

I am trying to change the appearance of the QGIS-Vertexmarker that is used when snapping is active and vertex/segment is found where you can snap to. I think i found the code snippet where in the cpp ...
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287 views

MODIS Imagery Orthorectification (Open Source)

I am looking for an open source free software/tool for orthorectification/Geometric terrain correction of MODIS imagery. I have looked at ESA (European Space Agency) SNAP but this sensor type is not ...
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46 views

Saga GIS Snap Points to Lines tool doesn't produce required results

I have two sets of data that I'm using. Points extracted from a .csv file and a road network from an ESRI .shp file (both of which I've included here: https://send.firefox.com/download/...
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22 views

Using V.clean.snap?

I'm working on creating a road network of pedestrian walkways. Since all data were manually drawn, I'll need to snap the vertices together to form a consistent road network on which I can run routing. ...
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46 views

How to switch on snap option in QGIS 2.18 when creating customize polygon

How to switch on snap option in QGIS 2.18 when creating customize polygon as in: class customPoly(QgsMapToolEmitPoint): def __init__(self, iface): self.iface = iface QgsMapToolEmitPoint....
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39 views

Removing a 'non-gap' gap from a polygon that straddles +/- 180 longitude; looking for an R-based, code solution

I am working with a set of polygons from here: http://lme.edc.uri.edu/index.php/digital-data. In the artic, there are several polygons that straddle the +/- 180 longitude line. These are single ...
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0answers
60 views

Available snapping points for advanced digitizing?

In QGIS, the Advanced Digitizing tools have some snapping features that I don't see mentioned in the documentation. We know that we can digitize new segments that are perpendicular or parallel to ...
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99 views

Odd output for PostGIS st_snap

I'm trying to snap a line theme to a point theme using PostGIS with a filter so they only snap to records with the same reference number. The query I'm using is as follows (this is a sample of the ...
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52 views

ST_Snap doing weird things

Consider the following query: WITH geoms AS( SELECT ST_Buffer(ST_MakePoint(10,10),5,200) as circle, ST_MakeEnvelope(5,5,15,15) as square ) SELECT ST_Snap(square,circle,15) geom FROM ...
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1answer
88 views

Preventing layer name from snap tip blocking view in ArcGIS Pro?

When I am using ArcGIS Pro 1.2 and I get near a layer, the layer name physically pops up and it blocks my ability to see where the pointer is in relation to the line and its intersection with another ...
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168 views

Topology Checking issue in Qgis 2.14.1

I am working on a large data set of Road with snapping tolerance 5px with topological editing option enable. When i am zooming to the snapped vertex with zoom level upto 1:50, its looking snapped or ...
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58 views

QGIS Snapping is not aligned with layers

I was trying to draw lines based on hex grid, but snapping give me wrong position of hex corner. As you can see, I used snapping-advanced-25 pixel from hex grid, but it is not aligned hex grid. It ...
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90 views

ArcSDE In a version geodatabase, snap tool does not work on a database feature class

I am setting up a series of tasks for technicians to complete. To finish the map template they will be working from, I must snap leak points to gas mains using the snap tool. However, after running ...
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0answers
592 views

clipping raster changes raster values?

I am working with BIOCLIM temperature/precipitation layers and I have noticed that when I clip the global raster down to a specific region, something happens and the raster value at a specific point ...
2
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646 views

Moving multiple features to snap to nearest edge

I have thousands of long rectangular polygons which I need to align to a specific/nearest edge. The screenshot below demonstrates what I need to achieve: Yellow and white dotted features need to ...
2
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0answers
113 views

How can I do multiple snapping of vector layers in QGIS?

I have a network of a transport system that I created from 1970-2013. However, the accuracy is letting me down as I used different snapping settings throughout the process. Is there a plugin or a way ...
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584 views

Get Feature that was snapped to in New Snapping Environment

I asked this over at the ESRI forums but lack of activity over there made me post here as well. Does anyone know if there is a way to get the feature that something was just snapped to in the ...
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33 views

How do I add vertices on a segment in QGIS 3.9.? Double-clicking doesn't work

I tried adding vertices to segments of a polygon by double-clicking on the segment, but instead of adding a node, the nearest node was moved to the double-click. Clicking on the cross doesn't work ...
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28 views

Snapping to vertices in vector tile layer using ArcGIS Pro?

I am trying to create features in a geodatabase layer using the tracing tool of ArcGIS Pro. I am able to use other shapefile layers in the project for tracing but vector tile layers loaded from the ...
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59 views

How to enable tracing in QGIS 3 beyond applications for adding polygon purposes?

I have used the enable tracing feature in QGIS 3 to create new polygons (Add polygon feature), and it works very well. However, i have not been able to use it for other purposes beyond that, for ...
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37 views

QGIS 3.X CAD tools not working with snapping on PostgreSQL layers?

If I create a scratch layer in EPSG 32720 CAD Tools are working fine with snapping options. The vertex are highlighted etc. etc. If I use a PostgreSQL layer, same EPSG, the snaping is working, but ...
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170 views

Activating snapping with PyQGIS?

I would like to construct a map tool application that allows only to add some point features. How do I complete the following code to activate snap mode while editing a layer with PyQGIS 3? from ...
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30 views

Line feature won't stay in place

I'm working on a storm network system and have an issue with a drain line. When I try to snap it to a point, it moves slightly to the right every time. I've checked that there isn't topography for ...
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125 views

Nearest point does not intersect line in 'sf' R package

This is a similar question to my recent questions on how to find the nearest point along a polyline and how to split a polyline by an intersecting point using only the sf package. My question has ...
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215 views

Not snapping to Guides in ArcGIS Pro?

I have a layout created with (layout)snapping on and set to snap to guides only. I have a series of rectangles for my title block. Depending on the information within the rectangles, I may need to ...
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130 views

Snapping an annotation feature class (anno class)

Is there any work around for being able to snap an annotation feature class (non-simple feature type) to the vertex points of another layer en masse? Similar to how the 'Editing toolbox > snap' tool ...
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317 views

Move node feature and snap to node of other layer

This seems like I'm missing something obvious - I have a layer with node features that I need to update the position of by referencing another node layer. Should be a simple move and snap-to ...
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0answers
286 views

Snapping Elements in Layout to Neatlines using ArcGIS Desktop?

I was wondering if there is a way to snap the center of an element to a neatline using ArcGIS 10? For example I have a neatline running down the center of the map in layout view and I want the ...
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0answers
112 views

Cancel/pause a Geoprocessing Task without rolling back?

I have a Snap Geoprocessing task that is for about 57,000 points to lines. The issue is I need to restart the VM it is running on. I have no idea how long it is going to run as it has been going for ...
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413 views

Vector topology cleaning of shapefiles not showing cleaned results QGIS(2.8.6) and GRASS

I tried to do some topology cleaning with GRASS v.clean (snap tool)but the cleaned result is not showing. Using the break tool works But for some reason i have not been able to run the snap tool and ...
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378 views

Snapping coordinates/points across different layers in QGIS

I'm referring to the plugin that was Numerical Vertex Edit where it selected the nearest point in one layer and allowed for a copy and paste to another layer's any given point to match its coordinates....
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62 views

qgis snaps to outside instead of boundary

I have polygon layers that I need to be covered by other polygon layers, and many of my inner layers have a vertex on the border of an outer layer or in some cases they share an edge. Both ST_Covers ...
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0answers
111 views

Activating new Snapping feature in ArcGIS Engine while editing features and vertices?

I'm working on new Snapping Capability of ArcGIS Engine. I want to use snapping capability using ISnappingEnvironment class while users are editing a feature or moving vertices. I tried IPointSnapper....
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87 views

How to set snapping specification in web map feature layer (arcgis)?

I need to set snapping to snap just to polygon vertex (by default it snaps to polygon vertex and edges). In this example and according to this, the map.enableSnapping() function should return an ...
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0answers
702 views

Create Right of Way from Street Centerline file

I have a project where I would like to take all of the right of way areas in a county and categorize them based on type/ownership (state right of way vs. county vs. private and maintenance ...
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0answers
86 views

How to stop QGIS auto snapping new poly lines as they are being created?

Im creating a polyline based data set which involves digistising around a large amount of street outlines. Is there a way to stop QGIS from auto snapping the new polyline section to a straight ahead ...
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199 views

Matching/snapping two shapefiles using node and snapping tools

I am trying to edit my shapefiles through QGIS 2.6.1 Brighton. I used the node tools to snap the necessary nodes to eliminate spaces between two shapefiles. However, while doing it I noticed that an ...
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0answers
177 views

Alternative to Snap (Editing) in QGIS/MapInfo?

Is there any alternative to Snap (Editing) in either QGIS or MapInfo (user-made tools), or another way to do this in ArcGIS without an advanced license?
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212 views

how to avoid Intersection of polygons via python code

i am using QGIS 1.8 and i can set the check box in Setting\Snapping Options "Snapping and Digitizing " dialog to avoid polygon intersections and enable topological editing but i am looking for a way ...
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1answer
283 views

Snapping Manager

We are using ArcGis js API version 3.12 and 3.5. and we are trying to use the snappingManager object. We can only snap to recently drawn objects and can't snap to all the layers. We have just once ...
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21 views

Snapping value = 0 in Qgis

I am building pipes network, I need check connection between of pipes. I want to pipes must snap and tolerance has value = 0. Is there any tool to check and fix this things. I know Topology Checker ...
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0answers
14 views

Snap GPS coordinates to closest line, get line ID, generate and execute URL

I have a web map in Portal that has a sidewalk line layer. Using Portal, I plan to collect sidewalk deficiencies using GPS (on a Microsoft Surface/Windows 10 device). I would like to add the ...
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0answers
18 views

Snap raster to specified coordinate point?

Is there any way to get a raster to snap to a specified coordinate point? The documentation for the snap raster environment setting says: The lower left corner of the given extent is moved to the ...
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35 views

Snap points to nearest polylines within buffer (fast)

This is a working version of snapping any point to nearest polyline within a buffer distance. But, this takes significantly longer as each time it copies the point to a different shape and snaps it. ...
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20 views

Snapping together lines within certain tolerance with ArcPy and Basic level license?

I have a GIS layer of bike lanes I created using an open-source GeoJSON which I converted to a shapefile using ArcPy. The end result looks pretty good, with one exception: there is some small gaps ...
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1answer
77 views

ST_SnapToGrid doesn't work properly, e.g. 41.94186153740355 -> 41.941861499999995

I'm using ST_SnapToGrid: ST_SnapToGrid(somePoint, 0.0000001) and I get strange result on many points, such as: - POINT (21.619820510769063 41.94186153740355) -> POINT (21.6198205 41....
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53 views

pyinstaller stops in the middle of process

I try to create a .exe from a .py script. I use Pyinstaller. The script runs fine with no errors in Pycharm. If I open the .exe my Tkinter opens I can choose the files etc.. And then in the middle of ...